Make "bin/phd status" report local daemons from the process list, not a mess of local/remote information

Summary:
Ref T13321. Fixes T11037. Realign "bin/phd status" to just mean "show daemon processes on this host".

The value of bin/phd status as a mixed remote/local command isn't clear, and the current output is a confusing mess (see T11037).

This also continues letting us move away from PID files.

Test Plan: Ran bin/phd status, saw sensible local process status.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13321, T11037

Differential Revision: https://secure.phabricator.com/D20604